Electric clutch motor



NW. 11, 1947. c, GLANZ, JR 2,430,634

ELECTRIC CLUTCH MOTOR Filed Nov. 15, 1944- 2 Sheets-Sheet 1 As I Nov. 11, 1947. c. H. GLANZ,. JR 2,430,634

ELECTRIC CLUTCH MOTOR Filed Nov. 15, 1944 2 Sheets-Sheet 2 Patented Nov. 11 1947 UNITED STATES PATENT OFFICE 2,480,884 umcrmcfcwrcn MOTOR Christian 11. Glam, Jr., Louisville, Ky. Application November 15, 1944, Serial No. 563,592

1 2 Claims.

This invention relates generally to electric motors and more particularly to a new and improved clutch arrangementtherefor in which a plurality of power take-off shafts are provided on a single motor whereby power may be supplied therefrom either continuously or intermittently or continuously and intermittently concurrently,

the ultimate object being to provide a motor which is simple in construction, d rable and reliable in operation, and well ad pted to carry loads of different character.

Other objects and advantages of the invention will become more clearly apparent mm the following detailed description thereof aken in connection with the accompanying drawings in which:

Figure l is a plan view of an electric motor constructed in accordance with a preferred embodiment of the invention,

Figure 2 is an enlarged sectional view of the motor as seen along the line 22 of Figure 1,

Figure 3 is a sectional view taken along the line 33' of Figure 2,

Figure 4 is a fragmentary sectional view of the motor as seen along the line 44 of Figure 2,

Figure 5 is an enlarged sectional view taken along line B-i of Figure 2; and

Figure 6 is a fragmentary sectional view as seen along the line 3-6 of Figure 2.

Referring now to the drawings for a more com plete understanding of the invention, the numeral Ill generally designates an electric motor of the squirrel cage type having a frame or housing 4 to which the usual end bell I2 is secured as by screws l3. A stator core I 4 isrecelved interfittingly within the frame II and carries the stator winding II in the usual manner, the leads from the winding being extended through the frame as at IS. The rotor H of motor i is secured as by a press fit to a shaft l3, one reduced end portion of which is rotatively supported in a ball bearing l9 carried by frame H and the other reduced end portion of which is rotatively supported in an axial bore 2|) provided in a shaft 2| which is axially aligned with rotor shaft 3 and has a reduced end portion which is rotatively supported in a ball bearing 22 can'ied by end bell i2, bearings I3 and 22 being arranged in axial alignment and concentric with respect to the supporting members individual thereto as in conventional motor design or practice. I

An end thrust and spacer bearing 23 is provided between shafts i3 and 2| and lubricant is supplied to this bearing and to the journal bearing between the shaft by way of the reduced bore 24 in shaft 2|which terminates in a grease fitting Thus, by reason of the aforedescribed arrangement, shafts I8 and 2| together serve effectively as a single shaft support or composite shaft for the rotor |1. However, shaft I3 is driven continuously as the rotor rotates, but shaft 2| is inner reduced'end portion of shaft 2| and is.

secured thereto for rotation therewith by means of a slot and key arrangement generally designated 28.

Clutch plate 21 is normally urged axially of shaft 2| and its engagement with clutch plate 26 by a coil spring 29 interposed between the telescopingly with shaft 2|,

hub portion 30 of plate 21 and shoulder 3| on shaft 2|. The hub portion 3|] is threaded to receive a, tubular member 3| on one end thereof and is arranged-on the other end thereof to fit I the outside of the latter end being threaded to receive a bail bearing 32. which carries a clutch yoke 33. Yoke 33 carries diametrically opposed pins 34 which serve as pivots for the clutch arms or links 35, the arms being secured against lateral movement on the pins by means of screws 36 and washers 31 carried thereby.

Each of arms on the other end thereof is provided with a hole for receiving an eccentric 33 carried by clutch control shaft 39. Shaft 39 is journalled in suitable bearings 40 therefor provided in motor bell I2 and carries on one end thereof a set screw collar 4| and a control lever 42 on being oilset as at 43 to clear shaft 2|. Holes 44 may be provided in member 3|, if desired to permit escape of excessive lubricant.

From the foregoing description the operation of the clutch motor should now be apparent. It will sufllce, therefore, merely to point out that with the motor in operation and with the control lever in the position as shown clutch discs 28 and 21 are engaged under the pressure of coil spring 29 and, accordingly, both shafts l3 and 2| rotate to supply power from the motor continuously.

When it is desired to take power from shaft 2| intermittently, it merely is necessary to rock control lever 42 up or down whereupon movement of the eccentrics 38 acts through arms 35, yoke 33, bearing 32,

and member 3| to disengage disc 21 from disc 26. With the discs separated, shaft 2| is brought to a stop, but shaft l8, however, continues to rotate. Such an arrangement for a motor is desirable, for example, in a hot air heating system in which shaft l8 could be employed to drive a fan for distributing the heated air continuously whereas shaft 2| could be employed to drive the oil burner which usually is operated intermittently only.

Moreover, it will be apparent that shaft l8 may be used separately to carry a load continuously as in the case of a fan load, or shaft 2| may be employed to carry a stop and start load as in the case of sewing machines, for example.

Furthermore, it will be apparent that spring or weight means may be employed to bias the clutch to a disengaged position, in which case power is drawn from shaft 2| intermittently as lever 42 is manipulated. It also will be apparent that two clutches may be employed in accordance with the principles set forth in the present invention, one clutch being employed on each side of the rotor such that both ends of the motor shaft may be driven continuously and/or intermittently respectively.

While the invention has been described in particularity with respect to best one embodiment thereof, it is the intention in the appended claims to cover the full range of equivalents, thereof commensurate with the scope and spirit of the invention.

I claim as my invention:

1. An electric motor comprising a housing, a field assembly in the housing, an armature rotatably supported within the field assembly, a shaft projecting from one end of the armature and extending through one end of the housing, said shaft extending through the armature and provided with a clutch plate and a reduced extension projecting beyond the clutch plate, a secondary shaft journaled through the other end of the housing and provided with a hollow end portion receiving said reduced shaft extension, a clutch plate cooperative with the first mentioned clutch plate and being slidable on the hollow end of the secondary shaft, said secondary shaft being provided with a circumferential shoulder, a sleeve slidable on the shoulder and being connected to the second mentioned clutch plate, a coiled compression spring on the hollow end of the secondary shaft interposed between the shoulder and the second mentioned clutch plate for urging the latter plate against the first mentioned clutch plate, a yoke surrounding the sleeve, a bearing assembly swivelly connecting the yoke to the sleeve, and means for actuating the yoke to disengage the second mentioned clutch plate from the first mentioned plate, said second mentioned plate being slidably connected to the hollow end of the secondary shaft.

2. An electric motor comprising a housing, a field assembly in the housing, an armature rotatably supported within the field assembly, a shaft projecting from one end of the armature and extending through one end of the housing, said shaft extending through the armature and provided with a clutch plate and a reduced extension projecting beyond the clutch plate, a secondary shaft Journaled through the other end of the housing and provided with a hollow end portion receiving said reduced shaft extension, a clutch plate cooperative with the first mentioned clutch plate and being slidable on the hollow end of the secondary shaft, said secondary shaft being provided with a circumferential shoulder, a sleeve slidable on the shoulder and being connected to the second mentioned clutch plate, a coiled compression spring on the hollow end of the secondary shaft interposed between the shoulder and the second mentioned clutch plate for urging the latter plate against the first mentioned clutch plate, a yoke surrounding the sleeve, a bearing assembly swivelly connecting the yoke to the sleeve, and means for actuating the yoke to disengage the second mentioned clutch plate from the first mentioned plate, said second mentioned plate being slidably connected to the hollow end of the secondary shaft, said means for actuating the yoke comprising a pair of arms projecting from the yoke and having openings therein, a shaft extending through the housing transversely and provided with a handle at one end thereof and cams on the shaft and operating in the openings of the arms to move said arms and the yoke structure in. shifting the second mentioned clutch plate.

CHRISTIAN H. GLANZ, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,298,376 Neuland Mar. 25, 1919 1,669,507 Dickson May 15, 1928 1,826,172 Greenwald Oct. 6, 1931 2,039,714 Fuller May 5, 1936 2,149,873 Shapiro et al Mar. 7, 1939 2,263,156 Abel Nov. 18, 1941 FOREIGN PATENTS Number Country Date 5,985 Great Britain 1910 225,564 Great Britain Dec. 31, 1925 436,195 Germany Oct. 25, 1926 

